A Canadian Loophole for Georges St-Pierre?

The norm for MMA fights is to allow a one pound allowance at their official weigh-in except for title fights where both fighters must be the exact weight or below. A recently leaked video shows the UFC's Senior VP of Business and Legal Affairs and Assistant General Counsel, Michael Mersh, state to Nick Diaz and camp ten minutes before weigh-in that they will allow a 0.9 lb weigh-in allowance at UFC 158. He goes on to say that 170.9 will still count as 170 even. They question why they were not told before with no solid answer. Was Georges St-Pierre slightly overweight prior to his UFC 158 weigh-in? With such a highly anticipated fight was the UFC giving special treatment to one of their biggest stars and to keep the fight a title fight? Nick Diaz did weigh in at 169 while Georges St-Pierre weighed in at 170. Was St-Pierre truly at 170 or higher? He always does appear to be bigger and roided out for his fights. Hopefully this video does not get deleted.